More plot-oriented shows should add an element of surprise to their shows and drop the episode previews altogether like Shiki. We all know by now that episode previews usually spoil the crap out of us.
Case in point: During last episode’s cliffhanger, I thought Tohru was going to die. At the start of this episode, it seemed like Shimizu attempting to feast on his blood was all a dream, which made me relieved (because Tohru is cool). And then, they went ahead and surprised me by having him die anyway. I like it when shows do that to me, and if Shiki had an episode preview, I would probably know for sure Tohru was going to die here.